Dear All,

I am a student with no background in electronics. I want to make a circuit with a DC power supply that supplies min ± 2kV to max ± 7kV to the circuit. I have a bipolar DC source with a mechanical switch to change the polarity. However, I am looking forward to setting the polarity change from negative to positive (and vise versa) with the frequency set on the function generator (~1Hz), It should work automatically with the set frequency. I have no idea how to set the circuit with the power supply for the set frequency. I have seen about the H bridge.

Can you please let me know how this can be connected and how can I use the DC power supply that supplies voltage in the range of ± 2kV to max ± 7kV with 1hz using the H bridge or corresponding equipment?

Looking forward to hearing from you

Sincerely,
Gopika

 

Have you had prior experiences with high voltages like that?

This sounds like a daunting challenge.

 

Thank you for your reply,

Yes, I am currently doing experiments with the same range. As of now, I am changing the polarity manually. But I want to leave it untouched and also need highly precise data.

 

At 1Hz, a DPDT relay could be used.

 

Is the DPDT relay ok for the voltage range I mentioned, ie ± 2kV to max ± 7kV

 

Is the DPDT relay ok for the voltage range I mentioned, ie ± 2kV to max ± 7kV

You might have to work to find one that is compatible with those voltages. Don't expect to find one for minimal cost.

 

Okay, thank you

 

It is not safe to work with 7 kV or even 2 kV power supplies, whether or not you are a student.

 

it depends on current... as long as current/energy is limited, it should be fine even if unpleasant.

 

Hello,

You will need some high voltage relays.
This page shows you some:
https://www.te.com/en/products/relays-and-contactors/relays/high-voltage-relays.html?tab=pgp-story

Bertus

 

I would caution all present that such high DC voltages can very quickly be fatal, both to the TS and for those with no understanding of the hazards. So I suggest that this is an area where those able to handle the voltages safely will already know how to create such a supply.

 

Thank you so much